Reinforcing-truss for concrete.



PATENTED FEB. 20, 1906.

E. B. JABVIS. I RBINFORGING muss FOR conoan'rs.

AiPLIOATION FILED JAN.13, 190s.

Wi /7714965 65- w/ other, the said truss bein v beam UNITED" STATES PAT FFI E I I EDGAR BEAUMONT JARVIS, TORONTO, CANADA.

REINFORClNG-TRUSS FOR CONCRETE.

Specification of Letters Patent.

Application filed January 13, 1905. Serial No. 240,933-

To all whom 'it mafy concern: I

Be it known that I, EDGAR BEAUMONT JAR- VIS, of'the city of Toronto, in the county of York, in the Province of Ontario, Canada,

' have invented certain new. and useful Imobliquel shaped ends provided with curled termina lips, the shortestbar being located in the center of the Width and length and the longer arranged in airs on each side of the central bar and havlng the ends projecting eduidistant from the "ends of such bar,

and amps molded so as to extend across 1nd around the bars to hold them separated from and yet locked in relation to each otherwise arranged and constructed in etail as hereinafter more particularly enplained.

Figure 1 is a perspect ve view of my im-' proved truss for CQHIGIItltlOUSbOdlGS.

Fig. 2 1s a longitudinal section throu h the truss at one side of the central bar. F1 3 is a cross section. Fig. 4 is a detail of a single'bar.

In the drawings like letters of reference indicate corresponding parts in each figure.

A is the central bar, which is preferably made with nicks a in the ed es thereof and particularlyin the horizonta portion. The ar A is set edgewise in the cement inthe that'is to say, With the-narrowest portion at the top and bottom'-and is provided with obliquely-shaped ends A, having the curled terminal lips (1' extending equally on each side of the bar, being divided centrally of the width of the bar.

B B are apair of bars located one on each side of the bar-A and separated a slight distance therefrom and provided with nicks b in the ed es, the obliquely-shaped ends'b, and the cui'led terminal lips I)", and C 0 area pair of bars rovided with nicks c in the edges and curled ips c at the ends, the bars 0 being separated from end to end, as indicated. The

C C are located to the outside of the bars B 7 the bars A,- B, and C are held separated,

from each other by the clamps l), which are molded around the bars,- as indicatedin the drawings, the bars being temporarily held to-'; 1 gether 1n their proper position and set in the. molds, so that the metal will flow into the mold around the bars. It will thus be seen. that the bars will be held securelyrtogether;

The molds are preferably placed close to the v A obliquely-shapedends.

In my, truss the clamps D extend at a greater distance below the bottom than the top of the bars in order to hold the bars well clear of the bottom of the concrete beam. In

molding the clamps' D it will be seen that they will be held securely from longitudinal displacement in thebarsiby the metal extending into the nicks a, b, and c. -When the clamps are placed close to the obliquely shaped'ends, they are necessarily, of course, I prevented from longitudinal displacement'in the one direction, but even if they are not so placed the nicks will hold them from longitudinal displacement on account of the metal running into the nicks. As the bars arelaced edgewise and, the clamsf-securely old them in such position,it l be-under stood -that Ihave produced a truss which .with the obliquely-shaped end is capable ofu resisting a maximn'mtehSile and shearing strain. In order 'to further take up the shearing strain,'I preferably utilize obliquely; set bars a in the blocks D, such bars being inserted in the mold and the block orclamp cast around them;

I may in some forms of truss simply use a bar or a plurality of barswith blocks cast around them-at desired distances apart and dispense with the obliquely setting of the s of the bars. In fact, I may cast the with an blocks obliquely-set extending upper end.

Of course I do not wish to I limit myself to the cross-sectional form of the bar, which may be changed to either asquare, round, or 100 other suitable cross-sectional form.

I referably cast the blocks D with lugs d,

so t at the tensile strength of the concrete will be reinforced to a minimum extent below] the bottom of the bars.

What I claim as my invention is 1. In a truss for concrete beams and the like, the combination with the central bar provided with obliquely-set. ends, of the side bars provided with obliquely-set ends and located on each side and extending beyond each end of the central bar, perforatedclamps .Patented Feb. 20, 1906.

III-S like, the combination with the central bar 20 J located on each side and extending beyond permanently carried the bars and through which the bars extend for holding the bars separated and from lateral and longitudinal displacement as and forthe purpose speciprovided with obliquely-set ends,- of the" side ars provided with obliquely-set ends and located on each side and extending beyond the central bar, and clam s molded onto the bars and designed to ho (1 them separatedand from lateral and longitudinal displacement said= molded clamps gexten'din transversely of the sidebars and central bar and for'min 'the sole (2 'inection between them as and or the purpose specified.

3. In 1a truss for concrete beams and the provided with obliquely-set ends, of the side ars provided with obliquely-set .ends and the like,v the combination with a plurality of bars placed side by side and having nicked oreach end of the central bar,- and clamps molded ontovthe bars and obliquely-shaped ends.

and designed to hold them separated and from lateral longitudinal displacement said molded clamps extending transversely oi the side bars and central bar and forming the sole connection between them as'and for t he purpose specified. I V a 4. Ina truss for concrete beams and the like, the combination with thecentral bar provided'with obliquely-set'ends, of the'side bars provided with "obliquely-set endsand located on each side and extendin beyond each end of the central bar, the sai bars being provided with nicks on their edges and clamps moldemonto-the bars and designed to hold them separated andv from lateral and longitudinal displacement said moldedclamps v extending transversely of the side bars and,

central bar'and, formingithe sole connection provided with obliquely-set ends and located 'on each side and extending. beyond each end of the central bar, clamps through which the between them-as and forthe purpose specibars extend for holding the bars separated and from lateral and longitudinal displace ment, and su plemental side-bars located on each side oft e aforesaid bars and extending beyond the obliquely-set ends ofthe aforesaid bars and clamps through which the bars extend for holding the bars se arated and from lateral and longitudinal isplacement as-and for the urpose specified.

6; Ina rein orcing-trussfor concrete and roughenedsurfaces, of a block or-clam cast around the bars, so that the metal wi flow into the nicks. as and for the purpose specified. Y

' 7Q In a reinforcing-truss for concrete and the like, the combination with a plurality of bars laced side by side and having nicked or roug ened surfaces, of a block or clamp cast around the bars, so that the metal will flow into the nicks, and a supplemental bar extending from the cast blocx or clamp as and for the purpose specified.

EDGAR BEAUMONT JARVIS; -Witn'essesf L QB. Born,

E; B SHEFFIELD. 

